This 180-year-old graffiti scribble was actually an equation that changed the history of mathematics
He used a Greek letter to denote a quaternion or vector, but today ... But we all use the technological fruits of that unassuming graffiti every single day.
In 1843, William Rowan Hamilton had a four-dimensional flash of insight that still shapes our three-dimensional world.
It is the most famous graffiti in mathematical history ... He used a Greek letter to denote a quaternion or vector, but today, following Heaviside, it is common to use a boldface Latin letter.
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